<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../boot/css/bootstrap.css">
    <script src="../boot/js/bootstrap.js"></script>
    <script src="../boot/js/jquery-3.5.1.min.js"></script>
</head>
<body style="background-color: #66afe9">
<h1 style="text-align: center">欢迎来到题库</h1>
<div class="row" style="margin-top: 300px">
    <button onclick="" type="button" class="btn btn-primary btn-lg btn-block">点击开始加减测试</button>
    <button onclick="" type="button" class="btn btn-primary btn-lg btn-block">点击开始乘除测试</button>
    <button onclick="" type="button" class="btn btn-primary btn-lg btn-block">点击开始混合测试</button>
    <div class="row">
        <button type="button" class="btn btn-lg btn-primary col-sm-4">更新题目</button>
    </div>
</div>
</body>
</html>